I have a specific area on the '93 Audi where I plan to try that, but I haven't done it yet.
BUT, that's a specific-to-that-car issue and probably not relevant to any other vehicle.
So far, my use of the Tornador Black leads me to believe that it's not really suited to this use overall. It just doesn't spray enough product nor at a high enough pressure (I'm running mine at 90 psi), at least not unless you keep it *very* close to the surface being cleaned. (Note that I'm used to keeping my foamgun's nozzle *VERY* close to the paint.) And it cleans a very small area; doing a whole panel would probably be quite problematic. The spray pattern might make it hard to keep previously-cleaned sections from getting resoiled.
I know guys use the Tornador to clean wheels/etc., but I dunno...
And remember that it atomizes any cleaner, so you'd probably want a respirator lest you breath in a lot of your rinseless. Note that I'm generally not too paranoid about this, but having used the Tornador with some shampoo mix, well...it's a valid concern IMO.
I *do* really like it for rinsing out jambs/etc. with plain water though, it's great for that.
Who knows, maybe I'll try it with the IUDJ and post back that I was completely wrong and it works great. But I kinda doubt it
